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OPA2350: OPA2350 slew rate

Part Number: OPA2350
Other Parts Discussed in Thread: TLV3501, TLV3502, OPA350, TLV3202

Hello all,

In one of my pulsed amplifier application,

I am using the OPA2350 OPAMP as comparator to detect the RF pulsed power and put a threshold on the health.

The pulse width is 200ns to 10us.

I am facing the following Issues.

1. The pulse width shrinks by 50 ns (because of slew rate). Can you suggest a similar OPAMP with same package(SO8) which can work for the specified narrow pulse width (higher slew rate).
2. I am not able to set the comparator voltage beyond 1.7 volt (with load). works fine without load.

I have attached the reference schematic (buffer,amplifier and comparator,buffer)

Please suggest